http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S55127370-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_596023cd3f1a2e4ced3f8094c3271104 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D209-86 |
| filingDate | 1979-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ce4ad47444d69f3da40c0f7d447446e |
| publicationDate | 1980-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S55127370-A |
| titleOfInvention | Preparation of carbazole |
| abstract | PURPOSE: To prepare carbazole useful as a raw material of N-vinylcarbazole, with simple and short steps, by treating 2,2'-diamino-4,4'-di-tert-butylbiphenyl with phosphoric acid. n CONSTITUTION: Carbazole of formula III is prepared by reacting (A) 2,2'-diamino- 4,4'-di-tert-butyl biphenyl of formula II (1 part by weight) prepared by the nitration and the reduction of 4,4'-di-tert-butylbiphenyl of formula I with (B) phosphoric acid (pref. 5W10 parts by volume of a 85wt% aqueous solution), at the boiling point of the reaction mixture for 5W15 hours to effect the simultaneous cyclization and dealkylation reaction. A polyphosphoric acid, fluorosulfuric acid, etc. may be used in place of the phosphoric acid. The by-produced isobutylene IV can be used as a tert-butylating agent, raw material for the production of tert-butyl alcohol, etc. n COPYRIGHT: (C)1980,JPO&Japio |
| priorityDate | 1979-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.